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United States Patent | 5,676,267 |
Slat ,   et al. | October 14, 1997 |
A multi-layer preform for forming multi-layer containers includes an extruded inner barrier layer containing polyethylene naphthalate, said inner layer having an upper portion adapted to be formed into an upper portion of a container, an intermediate portion adapted to be formed into an intermediate portion of a container, an extruded and a base portion adapted to form a base portion of a container. The preform includes an outer injection molded layer. The inner layer has a thickness which differs from the base portion to the upper portion.
Inventors: | Slat; William A. (Brooklyn, MI); Darr; Richard C. (Seville, OH) |
Assignee: | Plastipak Packaging, Inc. (Plymouth, MI) |
Appl. No.: | 455557 |
Filed: | May 31, 1995 |
Current U.S. Class: | 215/12.1; 220/62.22; 264/513; 264/515 |
Intern'l Class: | B65D 023/02 |
Field of Search: | 215/12.1,12.2,373,375,40 264/512,513,515 220/454 |
4954376 | Sep., 1990 | Krishnakumar et al. | 215/12. |
4990382 | Feb., 1991 | Weissenstein et al. | 215/12. |
5077111 | Dec., 1991 | Collette | 215/12. |
5102705 | Apr., 1992 | Yammoto et al. | 428/369. |
5250333 | Oct., 1993 | McNeely et al. | 428/35. |
5281360 | Jan., 1994 | Hong et al. | 428/358. |
5320230 | Jun., 1994 | Hsiung | 215/375. |
5464106 | Nov., 1995 | Slat et al. | 215/373. |